package com.yashi.appController;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.CopyOnWriteArraySet;

import javax.websocket.OnClose;
import javax.websocket.OnError;
import javax.websocket.OnMessage;
import javax.websocket.OnOpen;
import javax.websocket.Session;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;

import org.springframework.stereotype.Component;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.xiaoleilu.hutool.log.Log;
import com.xiaoleilu.hutool.log.LogFactory;
import com.yashi.entity.TbUserChat;



@ServerEndpoint("/websocket/{id}")
@Component
public class WebSocket {

    static Log log=LogFactory.get(WebSocket.class);
    //静态变量，用来记录当前在线连接数。应该把它设计成线程安全的。
    private static int onlineCount = 0;
    //concurrent包的线程安全Set，用来存放每个客户端对应的MyWebSocket对象。
    private static CopyOnWriteArraySet<WebSocket> webSocketSet = new CopyOnWriteArraySet<WebSocket>();

    //与某个客户端的连接会话，需要通过它来给客户端发送数据
    private Session session;

    //接收id
    private String id="";
    /**
     * 连接建立成功调用的方法*/
    @OnOpen
    public void onOpen(Session session,@PathParam("id") String id) {
        this.session = session;
        webSocketSet.add(this);     //加入set中
        addOnlineCount();           //在线数加1
        log.info("有新窗口开始监听:"+id+",当前在线人数为" + getOnlineCount());
        this.id=id;
//        try {
//             sendMessage("连接成功");
//        } catch (IOException e) {
//            log.error("websocket IO异常");
//        }
    }

    /**
     * 连接关闭调用的方法
     */
    @OnClose
    public void onClose() {
        webSocketSet.remove(this);  //从set中删除
        subOnlineCount();           //在线数减1
        log.info("有一连接关闭！当前在线人数为" + getOnlineCount());
    }

    /**
     * 收到客户端消息后调用的方法
     *
     * @param message 客户端发送过来的消息*/
    @OnMessage
    public void onMessage(String message, Session session) {
//        log.info("收到来自窗口"+id+"的信息:"+message);
//        //群发消息
//        for (WebSocket item : webSocketSet) {
//            try {
//                item.sendMessage(message);
//            } catch (IOException e) {
//                e.printStackTrace();
//            }
//        }
    }

    /**
     * 
     * @param session
     * @param error
     */
    @OnError
    public void onError(Session session, Throwable error) {
        log.error("发生错误");
        error.printStackTrace();
    }
    /**
     * 实现服务器主动推送
     */
    public void sendMessage(TbUserChat userChart) throws IOException {
    	Map<String, Object> map = new HashMap<>();
        try {
        	map.put("data", userChart);
        	map.put("status", 1);
        	map.put("message","聊天记录发送成功");
        	ObjectMapper json = new ObjectMapper();
        	String message = json.writeValueAsString(map);
			this.session.getBasicRemote().sendText(message);
		} catch (Exception e) {
			e.printStackTrace();
		}
    }


    /**
     * 群发自定义消息
     * */
    public static void sendInfo(TbUserChat userChart ,@PathParam("id") String id) throws IOException {
        log.info("推送消息到窗口"+id+"，推送内容:"+userChart.getContent());
        for (WebSocket item : webSocketSet) {
            try {
                //这里可以设定只推送给这个id的
                if(item.id.equals(id)){
                	item.sendMessage(userChart);
                }
            } catch (IOException e) {
                continue;
            }
        }
    }

    public static synchronized int getOnlineCount() {
        return onlineCount;
    }

    public static synchronized void addOnlineCount() {
    	WebSocket.onlineCount++;
    }

    public static synchronized void subOnlineCount() {
    	WebSocket.onlineCount--;
    }
}